UK will expel Russia's ambassador by 18 March 2018.

colejhudson
estimated 14% and said “Tillersons/DoS official position seems to be to hint at it, leaving it open for Trump to ultimately decide. Trump has deferred to the Pentagons judgement on matters of NatSec in the past. Last time he closed the SF Russian embassy little was gained.”
on 2018-03-14

fkovacs
said “It looks like UK calmed down, after the UNSC meeting.They’ve really put their foot in the mouth with their undiplomatic declarations and lost prestige on the international scene.Also, Russia responded “tit-for-tat” to the diplomats expulsions…”
on 2018-03-19